adj.无人操纵的；难以自持的；(鹰等）未经过训练的
We sent an unmanned rocket into earth orbit. 我们把一个无人驾驶的火箭送入了地球的轨道里。
Unmanned probes can be much smaller and lighter than manned spaceships. 无人驾驶探测器可以比载人航天器小得多，轻得多。
I am quite unmanned by the news. 那消息使我茫然若失。
